Spine treatment cushion



FIG. 1 is a front perspective view of a spine treatment cushion showing my new design, the broken line showing of the back pad is for illustrative purposes only and forms no part of the claimed design;

FIG. 2 is a side view, the opposite side view being identical;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a spine treatment cushion, as shown and described. 